/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "operators/writer/VeloxArrowWriter.h"

namespace gluten {

VeloxArrowWriter::VeloxArrowWriter(
    const std::string& path,
    int64_t batchSize,
    facebook::velox::memory::MemoryPool* pool)
    : ArrowWriter(path), batchSize_(batchSize), pool_(pool) {}

std::shared_ptr<ColumnarBatch> VeloxArrowWriter::retrieveColumnarBatch() {
  if (writer_ == nullptr) {
    // No data to read.
    return nullptr;
  }
  if (reader_ == nullptr) {
    reader_ = std::make_unique<ParquetStreamReaderIterator>(path_, batchSize_, pool_);
  }
  return reader_->next();
}

} // namespace gluten
